substitution of low Ca 2+-high Mg 2+ artificial cerebrospinal fluid (aCSF) for normal aCSF abolished the 5-HT-induced inhibitory effect but failed to affect the 5-HT-induced excitatory effect;

• (2 )用低Ca2 + 高Mg2 + 人工脑脊液替换正常人工脑脊液后 ,5 HT引起的兴奋效应仍可出现 ,但 5 HT引起的抑制效应不再出现 ;